I have a 93 Buick LeSabre with the 3800 series 1 need help locating the map sensor not sure if it will help me.l just replaced the harmonic balancer the crankshaft position sensor and the camshaft position sensor and still running rough was told that it could be the map sensor but not sure where it'* located

Was it the same person who told you it was the harmonic balancer or crank sensor?

Look for the emission'* label on your vehicle for it'* location...

Curious:

How many miles on this car?

How many miles have you owned it?

How old are the spark plugs?

How old are the wires?

I'm just as curious as to who is telling you this also.

And like Cathedral asked, when was the last time a tuneup was done?

Is there a service engine soon light on?? If so, get the code scanned or use the OBD1-paper clip test to see the code...Post back the code if there is one.
https://www.gmforum.com/obd-i-troubl...p-test-306836/
https://www.gmforum.com/obd-i-troubleshooting-200/gm-obd-1-paperclip-test-306836/
Buick'* appreciate new wires & properly gapped spark plugs, & you can tell a lot from the plug color itself. Post some pics of the plugs too.